<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link rel="stylesheet" href="作业2.css">
</head>
<body>
      <div id="app">
        <div v-if="books.length">
          <table>
            <thead>
              <tr>
                <th></th>
                <th>书籍名称</th>
                <th>出版日期</th>
                <th>价格</th>
                <th>购买数量</th>
                <th>操作</th>
              </tr>
            </thead>
            <tbody>
              <tr v-for="(item,index) in books">
                <td>{{item.id}}</td>
                <td>{{item.name}}</td>
                <td>{{item.date}}</td>
                <td>{{item.price | showprice}}</td>
                <td>
                  <button @click="decrement(index)" v-bind:disabled="item.count <= 1">-</button>
                  {{item.count}}
                  <button @click="increment(index)">+</button>
                </td>
                <td><button @click="removeHandler(index)">移除</button> </td>
              </tr>
            </tbody>
          </table>
          <h2>总价格：{{totalprice | showprice}}</h2>
        </div>
        <div v-else>
          <h2>购物车为空</h2>

        </div>

      </div>
      <script src="vue.js"></script>
      <script src="作业2.js"></script>

</body>
</html>